What type of event is classified as a "Broken Arrow"?

A "Broken Arrow" is specifically classified as an incident involving the accidental, unauthorized, or unintentional event associated with a nuclear weapon that leads to the loss of control of that weapon. This can include situations where a nuclear weapon is lost, unintentionally released, or otherwise compromised while still being an intact nuclear weapon.

In this context, "B" is the correct choice because it directly aligns with the established definition of a Broken Arrow incident as involving unauthorized scenarios related to nuclear weapons. This term emphasizes the seriousness of incidents that could pose a risk of nuclear proliferation or an accidental detonation.

The other options do not match this specific definition. For instance, intentional discharges or tests do not fall under the "Broken Arrow" category as they involve deliberate actions rather than accidental or unauthorized events. Malfunctions during testing are typically studied and documented rather than being classified as incidents of losing control of a weapon. Lastly, training incidents, while potentially risky, are not considered Broken Arrows since they are conducted under controlled, authorized conditions.